On the basis of finishing 4 CFB boilers of thermoelectric technological transformation project in Hebei smoothly and trying being transported, make an introduction in debugging some experiences in course, and make an introduction to performance test, it is helpful to hope to design and debugging work of the new aircrew.
CFB boiler; The boiler is debugged; Performance test of the boiler; Thermoelectric technological transformation project
Boiler running situation survey and study, find many times through go into operation 130- 460t/ h CFB already China, CFB boiler still has apparatus that is abraded seriously and defending rubing the problem not taking effective measures at present, because it is close to 50% that the accident stopped the total number of stoves to abrade the accident caused. It is the main reason that forced to stop the stove that the heated surface tube abrades the booster ownly. This text expound the fact China produce 440t/h vltrahigh voltage heat strengthen prevent necessity and optimum seeking that rub from defend rubing technology again.
Strengthen and defend rubing; Defend rubing technology; The stove accident stop; Heated surface
Summary: Have introduced the main website DMS, communication system and disposition of the automatic switch of circuit of the automated system of distribution line, and analyzed how many return circuits of power supply power the system under the way runs in the way.
Keyword: The distribution network is automized; Distribution line; Communication
One that is with China’s urban electric wire netting and rural power grids improvement project is fully under way, the automation of the distribution network has already gone on in all parts progressively. The automation of distribution line is automatic foundation and important component of the distribution network. All parts can proceed with important area in the distribution network according to the detailed conditions, optimize the structure of network, implement step by step, carry on the automatic transformation to some distribution lines first, cover the whole network finally, set up a set of high-level distribution network automated systems, thus reach and improve power supply quality and power supply reliability. This text puts forward the corresponding automatic scheme on distribution line in the urban 10 kV distribution network, and analyzed many power, actual operation way of the annular electric power system of many return circuits.
A design object
The planning design principle of the automated system of distribution network is the comprehensive management of realizing the distribution line at first. The concrete goal is to optimize the structure of distribution line and distribution wiring way, segment rationally, choose the circuit automatic switch, communication equipment and main website DMS software rationally; Realize the flexible contact of the distribution line, dispel the instantaneity trouble, isolate the permanent trouble, narrow and plan to overhaul and lose electrical power in the range with the trouble, reducing overhauls and loses electrical power with the trouble for time, improve the power supply reliability of the circuit and mix the management level of operation of power netwoks, reduce the work load of the line maintenance and operate the expenses. The concrete function including apparatus is oriented and managed, run and operate the management, accident and anticipate isolating from trouble diagnosis, trouble and supporting, part of the circuit rotates and following and revising etc. with colouring dynamically, temporary network.
2 systematic structure
The automated system of distribution line is made up of main website DMS system, communication system and automatic switch of apparatus circuit.
2.1 Main website DMS
The main website DMS software includes SCADA, AM/FM/GIS, trouble isolate and transfers to and support system and advanced application software automatically. The system adopts the open platform, has a flexible and convenient figure interface, integrate very vertically and horizontally. SCADA realizes telemetering measurement of distribution line, telesignalling, remote control and calls the police, monitors, operates the simulation, data to record and analyze, and have corresponding function of the platform supported by GIS. Automatic map AM, the intersection of equipment control and FM and geographical the intersection of information system and digitized the intersection of power supply and regional map and the intersection of distribution line and geographical position and electric parameter of apparatus of apparatus GIS, one-to-one correspondence of data such as the operation conditions, and real-time character that information geography of distribution line, data of running are visual that realize, benefit the operation management of the distribution line. The trouble is isolated and transferred to for the system to judge the sector of trouble after the trouble rapidly automatically, isolated the area of trouble, and produced load and shifted the scheme of supplying power automatically according to the operation conditions of the system, it is not that the trouble section supplies power to resume normally. The advanced application software can finish the trend and calculate, short out electric current calculating, network to reconstruct and lose electrical power the scheme is analyzed, the switch is operated topologically and discerned and coloured.
The main website DMS basic hardware disposition, for PC engineering accusing of machine, optic fibre Modem and communication mouth and inputting the output equipment colour display screen of the large screen, printer,etc. .
2.2 Communication system
The communication way of the communication system adopts the fiber optic communication ways of principal and subordinate, a pair of annular structure, have advantage well known. Pairs of the intersection of optic fibre and the intersection of ring and structure keep annular structure, save advantage of optical cable, overcome optical cable let trouble influence shortcoming that system run one o’clock in the annular structure, have it healing ability. Whole the intersection of communication and system include main website the intersection of end and the intersection of host computer and Modem and several FTU dispose from the machine Modem, every Modem has two pairs of optic fibres that receive and dispatch the mouth, and through the fiber optic communication ring main ring and a ring of connecting matching of two optic fibres . Two rings both work under the normal situation, the signal is transmitted in two rings at the same time in opposite direction. Any optical cable or optic fibre Modem breaks down in the ring, the optical signal returns from another ring automatically from optic fibre Modem in both sides of trouble point, guarantee the normal running of communication.
The communication stipulations adopt DNP3.0 relatively suitable for the distribution network, can also adopt the other communication stipulations according to the actual conditions.
2.3 Automize the switch in circuit
The circuit automatic switch can consider the adopting coincidently device, automatic distribution switch automatic coincident segmenting device ,Can also adopt SF6 switch and vacuum switch on the column to be worthy of using the corresponding control system. According to the characteristic of every distribution network, and fully consider the development of the distribution network and upgrading ability of the apparatus in the future, the line switch adopts the SF6 switch or upper vacuum switch of column on the column. Because two switch these possess, turn on, break, short out ability of electric current, can be finished turning on and giving up the function to the the intersection of trouble and piece by the circuit switch, reduce the power cut chance of the circuit; And these two kinds of switch running time are long, there are certain operation experiences.
The circuit switch mixes and forms the automatic switch of the circuit with FTU. FTU can control the network, moves the communication interface far, thus can realize telemetering measurement, telesignalling and remote control, support many kinds of the intersection of communication and way, can realize various the intersection of electric consumption and measure, load and the intersection of switch and the intersection of movement and the intersection of number of times and record, and offer programming interface and interface software,etc.. The information that the automated system of distribution line needs is uploaded the main website by the communication system after gathering through every FTU, the control order of the main website is assigned for every FTU to carry out by the communication system. In addition, FTU can also monitor the abrasion state of the switch automatically, appears in the newspaper at the main website if necessary, the person on duty of deployment can be according to the repair schedule of this arrangement, thus avoid the blindness overhauled, reduce plan repair time, narrow the scope of repair of the plan.
Way analysis that 3 runs
At the time of the normal running of distribution line, FTU of the automatic switch of the circuit measures and records the switch state continuously, electric current of circuit, voltage,etc., and calculate power factor, active power, inactive power,etc. parameter of running. When switch state, circuit parameter become abnormal, FTU reports unusual information at the main website through the communication system. System, DMS of main website, wheel ask FTU at the circuit at regular intervals, message reached to inquire break the real-time database and deposit into the historical database finally. The person on duty of deployment can inquire about these data in the position picture of electric equipment taking regional map as background on the display of large screen of main website, and can operate every circuit switch remotely directly, the change system runs in the way. When the distribution line breaks down, the main website DMS system starts trouble measuring, isolating and load to transfer to and support the system and call the police after receiving the trouble message of FTU or transformer substation circuit breaker, patrol and inspect relevant the intersection of incident and record and other information of FTU, judge trouble isolate with whether a load of trouble turn to support the scheme automatically, and imitate and check, submit to and manage the person on duty to operates or is implemented automatically by the main website DMS system remotely finally.
Regard showing much many power in the way of supplying power of return circuit in Fig. 1 as the explanation system of the example and run in the way now
When being normal, the contact switch a, b, c, d among the distribution lines breaks, 4 circuits run independently. FTU of each switch monitors, calculates and stores electric current, voltage of the switch,etc. analog quantity parameter of electric consumption and touches the head to divide state amount parameters such as the position of floodgate,etc. into, shut at the circuit, inquire about FTU automatically at the main website DMS, breaks and stores the database of main website, the controller can also inquire directly at any time or operate remotely.
While breaking down, if is a instantaneity trouble, coincident after the corresponding circuit breaker qualified for the next round of competitions or automatic switch of the circuit divides the floodgate, debug, the circuit resumes supplying power. If the instantaneity trouble point is on the circuit A sector Ⅱ, coincident after the switch e divides the floodgate; The trouble point is on the sector, coincident behind a point of floodgates of circuit breaker qualified for the next round of competitions. If the permanent trouble takes place on the circuit A, the circuit breaker qualified for the next round of competitions divides the floodgate to lock, the circuit A loses electrical power, every switch reports unusual information to the main website rapidly, start trouble measuring, isolating and load and transfer to and support the procedure on this circuit, judge the sector of trouble supposes for section ,The system of main website is automatic or submits to and isolates and operates the trouble manually. Divide and give up the switch e of the circuit, isolate each of trouble ,Then confirm it is not each of trouble Load transfers to and supports the scheme. The system chooses the circuit B in order to transfer to supporting the power first, and transfer to for simulation to check load, if tenable through checking the scheme, provide the movement order of the switch, person on duty can operate deployment remotely or operate the corresponding switch to transfer from the main website DMS to and support the scheme automatically; It is not the trouble section section such as being checked the circuit B and can’t be born the weight of Load, the system chooses other circuits to check sequentially, until confirming last transferring to supporting the scheme and succeeding in implementing.
4 concludes the speech
The automatic scheme of this distribution line is suitable for the distribution lines of various power supply way, can isolate automatically the intersection of trouble and circuit, a section of automatic recovery supplying power of trouble, raise distribution line, supply power reliable rate and automation of running greatly; The open platform of the system of main website, very compatible other advanced application software, integrate very vertically and horizontally, realize it to the communication interface of the system at a higher level, support the complex automatic system of transformer substation; The switch of FTU abrades the state and monitors the function, has offered the basis of repair schedules of the arrangement rationally. If the navigation system of adding the trouble a little more, can realize trouble branch and trouble point make a reservation within very short time after the trouble, can not only get rid of the permanent trouble but also can dispel the trouble hidden danger that the instantaneity trouble reflect, guarantee the safe operation of distribution line.
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