Four Main Objective of Power Plant Automation

1. Automatic Detection

• Automatic signal transmission of Equipment parameters
• The computation, display and record of signals

2. Automatic Modulation

• When under normal system operation, automatically adjust parameters such as water level of boiler, steam temperatures

3. Remote Control and Program Control

• Remote control
• Automatic operations controlled by programming: start/stop, load increase/decrease, event handling

4. Automatic Protection

• Automatic trip: when abnormal signal occurs, automatic trip
• For the safety of the equipment and human.

Sub-Control Functions Matrix

Abbreviation Used

DAS (Data Acquisition System)
( Boiler | Turbine | Generator | Common )

DAS is the system in which its main task is to acquire the data from any kind of inputs such as sensors via amplifiers, multiplexers, and any necessary analog-to-digital converters (the conversion of the resulting samples into digital numeric values that can be manipulated by a computer). The acquired data are then analyzed, recorded, and presented in the monitoring system meaningful to the human operator. Alarms may be generated and log. Historical trend can also be generated.

Inputs such as:

• Analogue Input Type : TD (Thermocouple), RTD (Resistance Temperature Detector), mA, V
• Digital Input Type : Digital, Pulse, SOE

Features and Functions

• Plotting: Bar Chart, Curve plotting, etc.
• Alarm Monitoring
• Recording of SOE (Sequence of Event)
• Captures, records, and displays the event occurrences in the chronological order that enables the quick identification of the cause of faults.
• Display Real-time or Historical Trends
• Provides information and analysis of different parameters.
• Sound and Light Alarm
• Operators may set different sound for special alarms.
• Operator will be aroused to take proper actions.
• Post-Fault Review
• The complete event are recorded in such that events prior to fault can be analyzed.

MCS (Modulation Control System)
( Boiler | Turbine )

The purpose of the MCS (Modulation Control System) is one of the basic main functions to provide automatic adjustment to all the controlled parameters during the operation of the power plant. In control terminology, it refers to a system in which the value of some output quantity is controlled by feeding back the value of the controlled quantity and using it to manipulate an input quantity so as to bring the value of the controlled quantity closer to a desired value. This is also known as closed-loop control system or loop control. It often contains the parameters of automatic regulation and deviation functions.

• MCS are mainly found in the Boiler Regulation Control, Steam Turbine Automation Control, and CCS (Coordinated Control System).

MCS - Boiler Regulation Control

Boiler Regulation Control includes several subsystems coordinating with each other to produce the required steam to drive the steam turbine. It requires safety, speed, and efficiency of its operation. The boiler control system needs to coordinate its operation with FSSS system to warrantee the safety of its operation.

The regulation control of boiler includes:-

• Mill and Coal-pulverizing Regulation System
• Coal-Powder Feeding or Fuel Regulation System
• Main Steam Temperature Control
• Main Steam Pressure Control
• Feed-water Control (Drum-water level control)
• Primary Air Fan Regulation System
• Force Draft Fan Regulation System
• Induced Draft Fan and Hearth Pressure Regulation System
• Oxygen Corrective System
• Reheat Steam Temperature Control
• Preheated Air Control

MCS - Steam Turbine Automation Control

A typical Turbine Automatic Control includes the following control subsystems:-

• Steam Turbine Digital Electro-Hydraulic Control System (DEH)
• Micro Electro-Hydraulic Control System (MEH)
• Bypass Control System (BPCS)
• Turbine Auxiliary Equipment Control System

MCS - CCS (Coordinated Control System)

CCS (Coordination Control System)
( Boiler | Turbine )

The coordination control system provides automatic control and coordination with the boiler and turbine control. It provides swift, accurate, and stable control based on the scheduled automation or operators manual command delivering an effective energy production. At the same time, the system is also capable of handling the failure of auxiliary equipment, abnormal operating conditions, and operation restriction. It utilized a high degree of adaption to achieve the best loading performance meeting the operation requirement of continuity, stability, and safety.

The system provides an effective energy balance methodology to control the turbine providing energy demand and the boiler providing energy supply and responding swiftly to the change of command and coordination from the CCS.

CCS load management centre provides the load handling instructions for speed limit, load limit, closed after the change, etc. It can also achieve regulation balance, primary air fan, oxygen corrective, and other functions. The Automatic Generation Control (AGC) of the boiler forms the basis of coordination and control which accepts the power grid load command and responds quickly to the needs of power grid load.

Coordinate the operation of the boiler, turbine and auxiliaries

Functions

• Load command management of the generator unit
• Frequency modulation of generator
• Runback
• AGC

Operating Modes

• Coordination control
• Boiler follow-up
• Turbine follow-up
• Manual operation control

SPOTB (Supercritical Pressure One-Through Boiler)

The Characteristics of Supercritical Pressure One-Through Boiler

• The quality of generating set expansion is increasing in the total circulation quality, the controlled course is accelerating;
• The parameter of the boiler is high, the steam has no phase change area
• No steam drum, the thermal storage of the boiler is relatively small, the dynamic course between the turbine and the boiler is close;
• Overheated section and evaporated section need to be controlled within a certain range;
• Direct blowing powder, the delay and inertia are relatively large;
• DCS system should do faster control and protect.

The Coordination Control of Supercritical Pressure One-Through Boiler

The Coordination Control of Supercritical Pressure One-Through Boiler has particularity. One basic scheme is show as the following. It is composed by Load Order Loop, Pressure Constant Loop, Master Controller of the Turbine, and Master Controller of the Boiler.

Basic Scheme of Coordination Control System

Load Order Loop

The loop can realize the choose, speed limit, cut of operation mode, lock increase/decrease of the target load order and the treatment of RB loop.

• The Generating set has two kinds of modes, (Operator designated target load) and (AGC designated target load)
• To Set the Local (Target Load), operator can finished in operation picture.
• Through (speed limit, lock increase/decrease, RB Loop), the target load produces actual load order , then send to the master controller of the turbine and the boiler
• Fuel , Economizer Feed water flow , air supply volume order exceed the limit than the actual valve, produce (Lock increase/decrease) load order.

When Auxiliary Equipment is in trouble, RUNBACK loop produces corresponding signal, and form the target valve of load reduction in generating set.

Pressure constant Loop

• Two operation modes: Constant Pressure, Slide Pressure
• Produce the set-point of Main steam Pressure according to (Load-Pressure Curve)
• The change of Pressure set-point is limited by the pressure speed
• Pressure set-point and pressure speed are set at the operator station.

Boiler , Turbine Master Controller

• To realize the switching of operation mode; according to the control mode, load order, actual load, main steam pressure set-point and actual pressure, get speed order of boiler side coal feeder, open order of feeder side.
• In generating set coordinate mode, the master controller of the boiler and turbine can coordinate the boiler and turbine, meets the load order, and guarantee the stability of main steam pressure.
• Through the working state of the boiler side and the turbine side, confirm the control method. For instance: The turbine side is move automatically firstly, belongs to TF control method: The boiler side adjusts pressure manually, the turbine side adjusts load automatically; On the contrary, the boiler side is move automatically firstly, is BF control method: The boiler side adjusts load automatically, turbine side adjusts pressure manually; when both the boiler side and turbine side are move automatically, it changes to CCS control
• In CCS way, when the boiler side appears unusually, turns into TF method automatically; When the turbine side appears unusually, turn into BF method automatically; Both turbine side and boiler side appear unusually, switch to manual method.
• In order to accelerate the respond of boiler side, CCS load regulator introduces the feed-forward signal. After the treatment of Lead and - lag link of actual load order, receive feed-forward signal

One-Through Boiler Water Feed Subsystem

• The Water feed flow of One-Through Boiler is correlated with working load directly, water feed system is the important tache in control system of generating set.
• In Boiler Control system, usually take the water feed flow, middle point temperature as input control variable, output observing variable, and carry out control operation.
• In view of the inertia of the boiler, compared with fuel order, water feed order needs to delay generally.

Water-feed - Fuel Ratio Control

• In One-Through Boiler control system, the ratio of water feed and fuel needs to keep steady. Water-fuel ratio is constant, the middle point temperature can steady.
• In main regulator of water feed, adds fuel feedforward signal, which is favorable to the stability of water-fuel ratio. The principle is show as follows
• The Coefficient K of water-fuel is calculated by the heat value of coal, and fixed after actual debugging in the scene.
• Speed pressure represents the actual load demand, use P1 signal to revise fuel feedforward, through the treatment of filter F(t) and pure delay , and guarantee the time coordination between the water feed flow and fuel volume .
• Feed-water's Enthalpy Regulation
• The water feed system in One-Through Boiler, the middle point temperature is as regulated parameter. The fluid in the middle point is in saturation zone, the fluid temperature can not reflect the change of water feed correctly, the feed-water enthalpy can solve this problem if used as regulated parameter.
• The regulation principle of feed-water enthalpy is : feed-water pressure P and feed-water temperature T determine the feed-water Enthalpy H, the feed-water flow F with Enthalpy H has definite function relation with working load N.
• To regulate the sensitivity of feed-water Flow F using Enthalpy H , is better than the regulation function of the middle point temperature.

BPCS (Bypass Control System)

The bypass control system is composed by adjustment, interconnection and protection function. And exchanges information with DEH, FSSS system, carries out the control task of bypass system automatically, in order to meet the requirement of the unit in the mode of start, movement and load operation.

It designs the automatic and manual (remote control) operating mode of bypass valve.

When the operation pressure and operation temperature of host steam, reheat steam are over limit, bypass control system makes the bypass devices opened automatically, and adjust the pressure and temperature automatically, until restore normal.

The Concrete Adjustment function:

The fix value adjustment of high by-pass pressure

• Pressure adjustment of high by-pass steam;
• Temperature control of high by-pass valve steam.
• The fix value adjustment of low by-pass reheat steam pressure.
• Temperature control of low by-pass valve steam

Interlocking Protection Function

High-pressure bypass valve, low-pressure bypass valve and water-spraying valve are cooperating with each other according to the process conditions, to guarantee the safe operation of sets.

ACC (Air Cooling Control of Condenser)

Direct Air-cooled Condenser System

The Composition

Direct Air-cooled Generating Set is water-saving, and get fast popularization in the west that lack of water in China. The following picture is the thermal system of Direct Air-cooled Generating Set.

1. Boiler
2. super-heater
3. Turbine
4. Air-cooled Condenser
5. Condensate Pump
6. Condensed Water Fine Treatment Equipment
7. Condensate Booster Pump
8. Low-pressure Heater
9. Oxygen-eliminating device
10. Feed-water Pump
11. High-pressure Heater
12. Steam Exhaust Piping
13. Axial-Flow Blower
14. Vertical Motor
15. Condensate Water Tank
16. Iron remover
17. Generator

Direct Air-cooled system is a complicated system, related with the control function such as, condensate collect system, vacuum water-feed system, lock cooling water circulation system, Dematerialized Water System, bypass system/bypass valve etc.

Control Function

• Exhaust Pressure Control
• Air Blower Control
• Preheat and anti-freeze
• Water-ring Vacuum Pump Control

Exhaust Pressure Control

According to the exhaust pressure of the turbine, to control the rotate speed of fan electrical motor and keep vacuum. When steam load and the temperature of cooling air changes, according to the Air Blower Speed Configuration chart, to regulate the rotate speed of the Air Blower, keep the exhaust pressure of the turbine in constant value.

Air Blower Control

The Air Blower of Direct Air-cooled Condenser can regulate the rotate speed of the air blower or air blower unit, and stop or start the air blower or air blower unit according to the Fan Speed Configuration chart.

The condition of the change of Air Blower Speed

Environmental Temperature≥2 ℃

Air-cooled condenser is running in the 7th rotate speed; according to the deviation of turbine exhaust pressure, to adjust the rotational speed of the air blower.

Environmental Temperature＜2 ℃,

According to Speed Configuration chart, regulate the speed of the air blower.

SCS (Sequence Control System)
( Boiler | Turbine | Generator | Common )

The numbers of control measuring points used in the thermal power plant is generally a lot and its controlled processes are very complicated. Manual control of each control point or device (one control for one device) is not practical at all and such method of controlling will not meet the safety operation of the power plant. It is very dangerous and hazard if improper operations are executed.

A pre-defined and pre-programmed fixed sequence control can prevent operation mistakes, reduces the labor intensity, and thus increases the safety operation of the power plant.

The purpose of SCS is to:

• Enables  the start/stop sequence control of :-
  • The boiler
  • The steam turbine its auxiliary system
  • The generator or transformer unit
  • The power supply system for all components
• Reduces operator workload and prevents accident during operation.
• Accurately and quickly handles the situations during the start/stop.
• Accepts the operator instructions in executing the control in a certain sequence; it follows by a necessary logical calculation; pass down the control instructions to the related equipments; after the control instruction is executed at the equipment level and upon the receiving of the parameters and its status signal, then only the next sequence of control is executed.

SCS is an important sub-system of the DCS and can be categories into two types of control:-

1. Functional Group Type of sequence control

• Sequence control in related to grouped equipment. It can be executed independently.

2. Equipment Group Type of sequence control

• Base on the process control, the sequential control of different logical control functional groups, constitute a unit-level of sequence control.
• In the event of failure in Equipment Group Type of sequence control, the Functional Group Type can be used and this will not hinder the safety operation of the power plant.
• Equip with complete operational guidance, which helps the operator to quickly and accurately handle all kinds of events and situations.

Typical Examples of Functional Group

FSSS (Furnace Safeguard Supervision System)
( Boiler )

• Burner Management: The control of the burner oil gun and ignition process.
• Burner Management: To prevent the burning flame in boiler furnace from extinguishing.
• Boiler Safeguard: Preventing explosion or implosion of the boiler due to over-pressure etc.
• Boiler Safeguard: The surveillance and control measures of the automation system.

FSSS consist of two types of system: Burner Management System and Furnace Safeguard Supervision System. The design of FSSS system is accord with US standards, NFPA8502 National Fire Protection Association Standard and other relevant technical standards.

BMS (Burner Management System)

• Burner oil gun and ignition process (Start/Stop Sequence Control)
• Pulverized-Coal combustion control (Start/Stop Sequence Control)
• Pulverized-Coal Machine Control System

Features:

• The whole automation and control process from Start, Blast-blow, Burning, until the steadily operation of burner.
• It can also control through “stage by stage, sequence start”, and fulfill the automatic control of the burner.
• Burner control function in normal operating mode or RB “reburn burner” operating mode.

FSS (Furnace Safety System)

• Comply with the NFPA8502 standards.
• Burner blow/purge
• Oil fuel system leakage test
• Emergency Trip (MFT (Master Fuel Trip) /OFT (Oil Fuel Trip) Function

Safeguard and Supervision Features:

• To monitor the continuous operation of the boiler
• To produce Oil Fuel Trip (OFT) or Master Fuel Trip (MFT) signal rapidly and accurately.
• Though hardwire logic, carry out the relevant protection action for OFT/MFT signal.
• To put the emergency trip signal to BMS system and finish corresponding protection action.
• When MFT occurs, to keep the air intake of the boiler, removes the flammable object in the burner, hearth. Before satisfying relevant permitting conditions, prevent the fuel from entering the burner.
• Manual MFT trip function.
• Automatic record and display the “Tripping Reason”.

ECS (Electrical Control System)
( Generator | Common )

The electrical system control for the DCS system is divided into two subsystems:-

• Generator Electrical System
• Common Electrical System

Common Electrical System

The common electrical system is “common” and shared by the two generator units. Each generator is controlled by its own DCS system. The DCS system controlling of one of the generator unit shall NOT affect the normal operation of the other generator unit. The DCS systems of the two generator units has full supervision and control, however, the DCS systems has to be interlock to ensure only one DCS system has the operational and control rights. The operational and control rights can switch in between the two DCS system smoothly.

Turbine Generator Electrical System includes:-

• Transformer Unit 500 KV circuit breaker, Isolated Switch
• Generator’s De-Magnetic Switch
• AVR (automatic voltage regulator) control
• Auto Quasi-synchronization; ASS
• High voltage operation, Backup branch circuit breaker
• 6KV Bus main operating power branch switch
• 6KV Bus backup operating power branch switch
• 6KV Plant factory used, rapid cut-off device
• Low voltage transformer 6KV; 380V and 380V sectional switch
• Low voltage lighting transformer 6KV; 380V switch and lighting; maintenance transformer 380V sectional switch
• Safety phase of operating; backup branch switch

Common Electrical System includes:-

• Start/Spare Transformer 220 KV breaker, Disconnecting Switch, Loaded Voltage Regulation Switch
• 6kv common branch switch (OA,OB)
• Common transformer(#1, #2) 6KV, 380V and 380V branch switch
• Factory transformer (#1, #2) 6KV, 380V and 380V branch switch
• Chemical transformer (#1, #2) 6KV, 380V and 380V branch switch
• Factory common transformer (#1, #2) 6KV switch, 6KV feeder switch

Digital Electro-Hydraulic Control
(Steam Turbine)

The steam turbine digital electro-hydraulic control system is the most important functional subsystem of the turbine power generator. It utilized pure electric and high-pressure fuel-oil or low-pressure turbine oil hydraulic servo system component forming the Digital Electro-Hydraulic Control System (DEH). The control system is highly reliable and easy to operate, easy to maintenance, flexible, with features and design focusing on the redundancy of key components, self-diagnostic on every sub-modules, and risk reduction.

The primary function of the DEH system provides the load and speed control of the turbine. It also includes a number of other parameters of control such as over-speed protection, thermal stress, monitoring theturbine generator parameters, the start/stop sequence control, and other functions. In addition, DEH system also fully adapt to the other incident and events occurring during the process. This includes unit/crew incident working conditions (such as RB), start/stop running process, and other process requirements.

• Primary Control Function: Load Control and Speed Control
• Other functions: Turbine Start/Stop sequence control, Over-speed protection, thermal stress calculation, turbine parameter monitor etc.
• Redundancy of Key components
• Self-diagnostic on every sub-modules
• Risk reduction design.

Control Function

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Speed Control

Based on the thermal status of the turbine, turbine usage, inlet condition, and turbine life consumption, the DEH system determines its related speed-up ratio and automatically adjusts gradually to its required speed.

• Speed adjustment range from 50 ~ 3600 rpm
• Speed control loop and control precision of ± 1rpm (rated speed)
• Maximum increment/decrement of not more than 0.15% of the rated speed

Load Control

DEH system provides automation control from "initial load” to “full load”. DEH system can provide fast respond to the request of the primary frequency controller. There are three control modes: “Valve Control”, "Pressure Control" and “Power Control”.

• Power Control precision:± 0.5% (steam parameter in a stable condition)
• Static characteristics of speed ranging from adjustable rate, Setting scope of3% to 6%
• Power change in the range of ± 1.5% ~ ± 12%
• Frequency changes in the range of ± 0.025 Hz ~ ± 0.25 Hz
• Settling rate of 3% to 8%

Load rejection control functions

In order to improve the dynamic stability performance or the over-speed of the steam turbine generation during system power failure, the DEH system set up following the rejection load control functions:

• Instantaneous fast clearance, Continued fast clearance
  (taking into consideration of the turbine’s adaptive capacity control)
• Speed limit (OPC)

Over Speed Protection Trip

• Turbine speed is up to 110% of rated speed, DEH system sends out Protection Trip Order to Emergency Trip System device, and produces a series of protection actions.
• The protection action of the turbine is finished by ETS. For example, close the master steam door and medium-pressure regulated door…
• In normal operation mode of generating set, DEH system has provide 103%, 110% over speed testing means, which can examine whether the function of over-speed, trip system are normal.

Thermal Stress Calculation

Automation Turbine Control

ATC system can coordinate with the following control system and realize the whole automatic control in start–up process of the turbine group.

• Turbine control system
• Drain Pump Control System
• Turbine Bypass Control System
• Generator Excitation control system
• Generator Automatic Synchronization System

The Control Function of Turbine ATC

• Under least manual intervention, with a possible most speed-up, from Turning Gear speed to synchronous speed progressively, and incorporated into the generating net.
• The whole process control from initial load to normal load.

The Concrete Function

• The essential test before starting, guarantee the start condition of automatic start-up;
• The calculation of the speed-up and supervisory
• Speed and speed-up control function
• Stress calculation and supervisory function
• Incorporated Control of generating set
• Turbine’s load rate and load control
• Over speed protection control

Operation Mode

DEH system accept the order and signal of Coordinate Control system, can realize the following modes safely and economically

• Boiler coordinate mode
• Boiler Follow
• Turbine Follow
• Constant Pressure Operation
• Slide Pressure operation
• Manual Operation

DCS control system accords to the principle of step and layer control. When the upper control system is in trouble, it can change to the lower control system. The operator can also choose one operation mode. For example, Operator Automatic Operation mode; turbine automatic control.

Reliability Design

• Utilization of appropriate technology in redundancy with self-diagnostic of each sub-modules to ensure the most highly reliable DEH system.
• Triple measurement scheme (1-out-3, 2-out-3) on the most important analog I/O (speed, power, pressure, etc.)
• Redundancy on the most important digital I/O.
• All the important analog and digital I/O are installed with proper isolation.
• All the operators input instructions are verified and check according to the appropriate rules setup.
• Utilizing hard-wired connections to receive the TSI Turbine body temperature signal and measurement
• Any failure of individual component will not affect the operation of the whole system.
• The system is totally protected even when there is power supply interruption sensors failure, or motor drive failure.
• The control system is designed accordance with the principle of"protection against failure” and "safety auto lock-up".
• Static and dynamic test were conducted on a target model via simulation and a closed-loop system DEH controller before implementation.

Boiler Micro Electro-Hydraulic Control

Functions

• Automatic speed increase control
• Free Speed and load control
• The coordination control with water-supply control
  • Motor-driven Feed Pump and Steam-driven Feed Pump switching control
  • Motor-driven Feed Pump and Steam-driven Feed Pump input/stop control
  • Parallel Operation Control
• Interlock Protection
• Valve Testing
• Under the online state, small steam turbine trip test, distant test of inlet valve and control valve.

Supervisory information system
for the plant level

With the improvement of the automation technology in power plant, it is crutial to collect, analysis and utilize production information. Therefore, SIS system has appeared. The role of SIS is to provide realtime information for the security andeconomical operation of the power plant.

Based on the experience of implementing power plant system, Hollysys Company has developed the Supervisory Information System for the plant level -- HOLLiAS SIS. It provides specialized solution for automatic production and management in the power plant.

Through the high-speed network, HOLLiAS SIS connects with DCS system of each generating sets, obtains the production date and equipment state of generating set in real time, set up unified production information database. It is easy to learn the operational state of generating sets equipment, analyze the operation and overhaul, cost of power plant, and offer information for economic operation management in power plant.

The Function of HOLLiAS SIS

• To collect real-time production information of generating sets, so the product staff can obtain product information promptly, accurately and wholly.
• Set up the unified data platform.
• keep the large amount of real-time and historical production data of the generating sets for a long time
• Convenient to analysis and utilizing.
• Using the specialized function subsystem
• Analyze the existing data
• Discover the problem in the production
• Guide the administrative decision for economical operation.

Main Function Modules

• The Scrutiny of Production Process
  In real-time database, to finish the function such as collect, save, dispatch of on-the-spot data, and realized the supervision and management of whole production process.
• Performance Calculation
  To calculate various efficiency of the whole power plant online, including boiler, turbine and assistant system etc, and various losses, including coal, water, electric power, and heat loss etc, through these performance index, we can describe the operation economic situation of the generating set.
• Equipment Life Management
  To do comprehensive analysis and assessment to online information and off-line testing data of the equipment, and carry out status supervision and diagnose to its life status, provide relevant equipment assess, life loss, recent testing plan, operation/maintenance/ change decision etc to the power plant, the power plant makes the decision on maintenance and implement.
• Vibration Measures and Trouble Diagnose
  Through the testing of vibration, judge the trouble of generating sets, to improve the operation dependability of the generating set. It gathers the collect of Vibration Signal Acquisition, Time-Domain and Frequency-Domain Analysis, trouble diagnosis and network technology, adopts multiple new technologies, with higher comprehensive performance indexes.
• Load distribution in power plant
  To set up the mathematical model of load distribution, choose suitable mathematics optimal method, then realize the load optimal distribution in the parallel operation process that multiply generating sets in whole plant.
• Electricity Generation Costs Analysis
  Taking into the consideration of distribution of fixed cost, variable cost and electricity generation cost, to calculate the current electricity generation cost of power plant in real time, combine other factors of electric network , provide data support for offering price, and competitive price.
• Operation Guidance
  To the turbine’s status, especially hot stress is online supervisory and control, realize the reasonable loss of sets life, ant optimize the start/stop speed of the generating set, in order to improve the security and economy of the turbine. Through small index calculation and loss analysis, evaluate the operation of generating sets, find the problem and give essential operation guidance to operation personnel, optimize the operation process of the generating set, achieve the cost minimization and benefit maxima.

Management Information System

Along with the reform in electric power industry, it is the unceasing target of electric power enterprises to enhance production efficiency, working efficiency, and reduces operation cost with information technology. Therefore, Hollysys company has developed the Power Plant Management Information System HOLLiAS MIS that conformed to the reality of power enterprises.

This system absorbs advanced management though from home and abroad, in the practice of electric power enterprises, integrates the human resources, wealth, material, information together, enhances working efficiency with maximum and reduces the cost.

This system can realize the seamless connection with different DCS, and provides the solution for electric power industry from the automatic control floor of production to enterprise upper management. The system intends to improve enterprise management, improve the economic efficiency of enterprise, meanwhile improve and enhance the management level of enterprise, impels the modernization of management, serves for the ultimate objective, enhance the market competition ability and survivability.

Main Functional Modules

Production management

Product planning and statistic, operation management, safety management, DCS gateway

Equipment management

Equipment account management, equipment reliability management, equipment defect, protection fix value and warning, Non-Leakage management

Supply management

Fuel management, stock management, purchase management

Financial Management

Account management, Account Payment Management, Fixed Assets Management, Salary Management, Cost Calculation, teller management

Assistance management

Human resource management, Insurance management, environmental protection management, simulation chart management

Office automation

OA system, Archives management

System Characteristic

• Conforms to the management standard of electric power industry
• Tailor the unified report form of electric power industry
• Automatic production operation ticket
• Realize seamless connection with DCS gateway
• Provides the unified management of work tickets
• Strict control the water, mist and dust etc, environment factors
• Carries on equipment defects promptly
• Accurate real-time operation log management
• Carries on the automatic settlement to the fuel
• Effective control to large, minor repair projects

HOLLiAS MIS system is the comprehensive operation management system in electric power industry. It based on network platform of Intranet/Internet technology, uses the operation pattern of C/S, B/S, and is a management information system with advanced technology, practicable economy, reliable safety and excellent opening. It has implemented successfully in many electric power enterprises.