CN103219798A - Direct-current transmission converter valve control protection system and control protection method thereof - Google Patents
Direct-current transmission converter valve control protection system and control protection method thereof Download PDFInfo
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- CN103219798A CN103219798A CN2013100977750A CN201310097775A CN103219798A CN 103219798 A CN103219798 A CN 103219798A CN 2013100977750 A CN2013100977750 A CN 2013100977750A CN 201310097775 A CN201310097775 A CN 201310097775A CN 103219798 A CN103219798 A CN 103219798A
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Abstract
The invention relates to the field of direct-current transmission, in particular to a direct-current transmission converter valve control protection system and a control protection method thereof. The control protection system is formed by an operation system and a hot spare system which are in redundancy. The operation system and the hot spare system comprise a pole control system and valve base electronic equipment communicated with the pole control system respectively, the operation system and the hot spare system are connected with a thyristor triggering monitoring subsystem through optical fibers, and the thyristor triggering monitoring subsystem comprises a thyristor and a thyrustor triggering monitoring unit matched with the thyristor. Protection objects of the protection method comprise a converter valve and the valve base electronic equipment. The action results of the protection method comprise alarm, request switch and request trip. The direct-current transmission converter valve control protection system greatly improves operation stability of the direct-current transmission system, greatly reduces shutdown time and overhaul time of the direct-current transmission system and enables economical benefit advantages of the direct-current transmission system to be fully played.
Description
Technical field
The present invention relates to the direct current transportation field, be specifically related to a kind of direct-current transmission converter valve control protection system and control guard method thereof.
Background technology
The Redundancy Design and the imperfection of traditional converter valve control protection system only have a system can receive reported information from converter valve, and master-slave system are longer switching time, and DC transmission system is caused very big impact.The converter valve control protection system that has adopts the optical splitter design in order to reduce the quantity that triggers optical fiber in the high-pressure side, but the reliability of optical splitter is relatively poor, has increased the destabilizing factor of system.And traditional DC converter valve triggers with monitoring means and has PASSIVE SURVEILLANCE, coding complexity, do not have problems such as getting energy fast, and all the stable operation to system impacts.
Converter valve is the nucleus equipment of DC transmission system, and normal operation plays a part very important to DC transmission system for the stability of its work and reliability.DC converter valve all adopts the mode of multistage thyristor series connection to improve the withstand voltage level of converter valve at present; adopt water cooling system that converter valve and damping circuit thereof are cooled off simultaneously, so converter valve control protection system is wanted in time to realize reliably the DC converter valve of polycrystalline brake tube series connection is controlled and protected.
Summary of the invention
At the deficiencies in the prior art; the purpose of this invention is to provide a kind of direct-current transmission converter valve control protection system; another purpose provides a kind of direct-current transmission converter valve control guard method, and the coordinated of the present invention by utmost point control system, valve base electronic device (VBE), thyristor triggering monitoring means (TTM), thyristor damping loop and water-cooling system can efficiently and accurately finishes control and the defencive function of converter valve under the DC transmission system operating condition.
The objective of the invention is to adopt following technical proposals to realize:
A kind of direct-current transmission converter valve control protection system, its improvements are that described control protection system is made of redundant each other operational system and stand-by heat system; The valve base electronic device that described operational system and stand-by heat system include utmost point control system and communicate with it; Described operational system triggers monitoring subsystem by optical fiber and thyristor respectively with the stand-by heat system and is connected;
Described thyristor triggers monitoring subsystem and comprises thyristor and the thyristor triggering monitoring means that is provided with its coupling.
Preferably, described operational system and stand-by heat system receive from the state reporting information of converter valve simultaneously and handle, if operational system breaks down or switch to the stand-by heat system when detecting the converter valve fault, realize not having time-delay and switch.
Preferably, described valve base electronic device triggers monitoring means by one group of optical fiber and thyristor and communicates, and the optical fibre set number is corresponding one by one with the thyristor progression of single converter valve;
Described valve base electronic device triggers thyristor according to the triggering time sequential pulse that utmost point control system sends, and failed thyristor is positioned.
More preferably, described valve base electronic device comprises Control on Communication cabinet and detection trigger cabinet; Described Control on Communication cabinet receives from the control command of utmost point control system and with it and sends to triggering monitoring cabinet respectively, receive simultaneously to triggering converter valve and the valve base electronic device state information that the monitoring cabinet sends, to be transmitted to utmost point control system after the information aggregation process, described utmost point control system carries out corresponding protection action and issues trigger impulse according to the feedback information of valve base electronic device;
Described triggering monitoring cabinet is finished and is received behind the trigger command CP through being encoded into trigger impulse, send to thyristor and trigger monitoring means, and the reception thyristor triggers the repayment pulse of monitoring means, judge the converter valve state, and regularly upload the thyristor state information by bus communication, when converter valve breaks down, provide and report to the police or the tripping operation request.
More preferably, described Control on Communication cabinet is used to finish acquisition process, sending of VBE upward signal and the communicating by letter of incident of downstream signal, and the debugging of engineering site; Comprise communication board, output and tablet, power panel, check-out console and debugging plate;
Described triggering monitoring machine case comprises valve arrester operation counter, water leak detectors and gps clock; Described valve arrester operation counter is counted the action frequency of valve arrester; Whether described water leak detectors leaks to water-cooling system is detected; Described gps clock writes down and reports the situation of leaking of converter valve state, valve arrester action situation and water-cooling system.
More preferably, comprise in described one group of optical fiber and trigger optical fiber and repayment optical fiber; Thyristor progression≤144 of single converter valve.
Preferably, described thyristor triggers the protection level of turning down automatically after monitoring means is used to realize thyristor triggering and monitoring, thyristor forward overvoltage protection, thyristor dv/dt protection, the action of forward overvoltage protection, the reverse recovery and protection of thyristor, discontinuous current protection and with thyristor level state with protect the action situation to be sent to valve base electronic device by optical fiber; Be in high potential when thyristor triggers monitoring means, its work capacity obtains from thyristor damping loop.
Preferably, described control protection system comprises water-cooling system and thyristor damping loop, and described water-cooling system is connected with thyristor respectively with thyristor damping loop; The number in water-cooling system and thyristor damping loop is corresponding one by one with the thyristor level respectively.
The present invention is based on a kind of direct-current transmission converter valve control guard method that another purpose provides, its improvements are that the object of protection of described guard method comprises converter valve protection and the protection of valve base electronic device faults itself; The result of the action of guard method comprises that warning, request are switched and the request tripping operation; Described guard method comprises:
(1) when the valve base electronic device of operational system and stand-by heat system all during operate as normal, after the control protection system is received the trip signal of operational system, carry out operational system and stand-by heat system and switch,, then carry out trip operation if the operational system after switching is received trip signal;
(2) when having only 1 cover valve base electronic equipment operate as normal, another set of valve base electronic device fault, the control protection system is received the valve base electronic device request trip command of operate as normal, carries out locking converter valve trip operation;
(3) when the fault valve base electronic device sends the request tripping operation, the control protection system is not carried out trip operation;
(4) valve base electronic device triggers the information real-time judge converter valve state of monitoring means and water leak detectors repayment according to thyristor.
Preferably, the safeguard measure of converter valve comprises:
Thyristor progression≤redundant the progression that damages in the A, single converter valve (redundant progression refers to the quantity of standby thyristor, and when damaging quantity and be no more than redundant digit, system still can operate as normal), the control protection system is reported to the police;
B, in the single trigger process, if thyristor progression≤redundant progression+2 that overvoltage protection triggers take place in single converter valve, the control protection system is reported to the police;
C, water-cooling system seepage, the control protection system is reported to the police;
D, water-cooling system are leaked, and the control protection system is reported to the police;
The thyristor progression that damages in E, the single converter valve〉redundant progression, valve base electronic device request tripping operation;
F, in the single trigger process, if the thyristor progression that overvoltage protection triggers takes place in the single valve set point (set point can be set arbitrarily, sets according to actual condition), valve base electronic device request tripping operation;
G, valve arrester action, valve base electronic device reports action frequency.
Compared with the prior art, the beneficial effect that reaches of the present invention is:
1; the present invention adopts the converter valve control protection system of fully redundance; the valve base electronic device of multiple mode of operation compatibility; intelligentized triggering and monitoring means and VBE triggering repayment optical fiber and thyristor be method for designing one to one; the nothing time-delay that can realize master-slave system is switched; many kinds of mode of operations of VBE are selected; the Based Intelligent Control of converter valve protection a series of advanced functions such as communicate by letter with remote bus; improved the stability of DC transmission system operation greatly; greatly reduce the idle time and the repair time of DC transmission system, the economic benefit advantage of DC transmission system is not fully exerted.
2, thyristor triggers the monitoring means perfect in shape and function, and intelligent level is higher.
3, valve base electronic device VBE can compatible maximum 144 grades of thyristors, can use flexibility and reliability in the engineering of multiple voltage grade.
Description of drawings
Fig. 1 is a converter valve control protection system schematic diagram provided by the invention;
Fig. 2 is the functional schematic of valve base electronic device provided by the invention;
Fig. 3 is the cabinet front view of valve base electronic device provided by the invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Converter valve control protection system schematic diagram provided by the invention as shown in Figure 1, converter valve control protection system mainly triggers monitoring means (TTM), valve base electronic device (VBE), utmost point control system by thyristor and is connected optical fiber etc. partly to be formed, wherein utmost point control system and valve base electronic device VBE are two redundant systems fully independently, define poling control A of system and the utmost point control B of system respectively; VBE-A and VBE-B.Principle as shown in Figure 1, utmost point control A of system and VBE-A composition one overlap independently, and system, the utmost point control B of system and VBE-B composition one overlap independently system, during normal operation wherein a cover for main system (operational system), an other cover for from system (stand-by heat), two cover systems receive from the state reporting information of converter valve simultaneously and handle, if a certain cover system breaks down or can switch to the stand-by heat system rapidly when detecting the converter valve catastrophe failure, owing to need not restarting systems and tracing trouble, therefore can realize not having time-delay and switch.Main system (operational system) with trigger monitoring subsystem by optical fiber and thyristor respectively from system's (stand-by heat) and be connected; Thyristor triggers monitoring subsystem and comprises thyristor and the thyristor triggering monitoring means TTM that is provided with its coupling.Signal among Fig. 1 between utmost point control A of system and the VBE-A comprises:
CBON: switch folding signal; Bypass: throw bypass to signal; Cp: start pulse signal; Low-voltage test: low pressure applied voltage test signal; Un80: low voltage signal; Deblock: signal unblocks; Active: the principal and subordinate selects signal; Trip: tripping operation output signal; Rfo: unlocking signal, VBEok:VBE normal signal; The fp:CP return signal; Profibus: bus communication signal.
Triggering between VBE and the TTM is connected by two high pressure optical fiber (trigger optical fiber and repay optical fiber) with the repayment signal, optical fibre set number and thyristor level are one-to-one relationship, the triggering sequential that can send according to utmost point control system accurately triggers thyristor, can position failed thyristor accurately simultaneously.Function when VBE also comprises valve arrester operation counter, water leak detectors and gps clock school, the valve arrester operation counter is counted the action frequency of valve arrester; Whether water leak detectors leaks to water-cooling system is detected; Gps clock writes down and reports the information such as the situation of leaking of converter valve state, valve arrester action situation and water-cooling system.The functional schematic of valve base electronic device provided by the invention as shown in Figure 2.
Thyristor triggers that monitoring means (TTM) mainly realizes turning down automatically behind thyristor triggering and monitoring, thyristor forward overvoltage protection and dv/dt protection, the forward overvoltage protection action certain hour (by detecting the action frequency decision, setting according to actual condition) protection level, the reverse recovery and protection of thyristor, discontinuous current protection and with thyristor level state with protect the action situation to be sent to VBE by high pressure optical fiber; TTM is in high potential, and the required energy of its work obtains from thyristor damping loop.
The control protection system comprises water-cooling system and thyristor damping loop, and water-cooling system is connected with thyristor respectively with thyristor damping loop; The number in water-cooling system and thyristor damping loop is corresponding one by one with the thyristor level respectively.
Wherein valve base electronic device (VBE) is that utmost point control protection system realizes the control of converter valve and the nucleus equipment of defencive function; VBE comprises two kinds of function cabinets; as shown in Figure 2; trigger and monitoring cabinet and Control on Communication cabinet; the Control on Communication cabinet mainly is to receive from the multiple instruction of utmost point control system and with it to send to each triggering monitoring cabinet respectively; receive simultaneously to the converter valve that triggers the transmission of monitoring cabinet and VBE state information and aggregation process and be transmitted to utmost point control system, utmost point control system carries out corresponding protection action and issues trigger impulse according to the related feedback information of VBE.Described Control on Communication cabinet is used to finish acquisition process, sending of VBE upward signal and the communicating by letter of incident of downstream signal, and the debugging of engineering site; Comprise communication board, output and tablet, power panel, check-out console and debugging plate.
Triggering the monitoring cabinet mainly finishes and receives behind the trigger command CP through being encoded into trigger impulse, send to each thyristor and trigger monitoring means (TTM), and the repayment pulse of reception TTM, judge the converter valve state, and regularly upload the thyristor state information by bus communication, when converter valve breaks down, provide and report to the police or the tripping operation request.VBE has very strong compatibility; can satisfy the triggering and the monitoring of the maximum 144 grades of thyristors of single valve; be that each triggers monitoring cabinet and can monitor 1 single valve, 2 single valves or 4 single valves simultaneously, have the control defencive function of finishing converter valve that 5 kinds of perfect mode of operations and two redundant configuration can efficiently and accuratelies simultaneously.5 kinds of mode of operations of valve base electronic device VBE comprise the power-on self-test pattern, and converter valve is patrolled and examined pattern, normal mode of operation in advance, single-stage test pattern and low pressure pattern of pressure.
The cabinet front view of valve base electronic device provided by the invention also comprises air switch, power filter and power supply lighting device as shown in Figure 3 on the function cabinet of VBE, make the more perfect function of VBE.
The present invention also provides a kind of direct-current transmission converter valve control guard method, divides according to object of protection to be divided into converter valve protection, the protection of VBE faults itself.The result of the action of protection is divided into warning, (master-slave system) switched in request and request is tripped three types.Guard method comprises following several situation:
As master and slave system VBE all during operate as normal, after the control protection system is received the trip signal of main system, carry out system and switch, if the main system after switching is still received trip signal, then carry out trip operation.When having only 1 cover VBE operate as normal, another set of VBE fault, the control protection system is received the VBE request trip command of operate as normal, carries out locking converter valve trip operation immediately.When fault VBE sent the request tripping operation, the control protection system was not carried out trip operation.VBE is according to the information real-time judge converter valve state of TTM and water leak detectors repayment, and according to converter valve different conditions processing events, the converter valve safeguard measure is as shown in table 1.
Table 1 converter valve safeguard measure
Converter valve provided by the invention control protection system and control guard method thereof are finished control and the defencive function of converter valve under the DC transmission system operating condition by what utmost point control system, valve base electronic device (VBE), thyristor triggered that the coordinated of monitoring means (TTM), thyristor damping loop and water-cooling system can efficiently and accurately.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. a direct-current transmission converter valve control protection system is characterized in that described control protection system is made of redundant each other operational system and stand-by heat system; The valve base electronic device that described operational system and stand-by heat system include utmost point control system and communicate with it; Described operational system triggers monitoring subsystem by optical fiber and thyristor respectively with the stand-by heat system and is connected;
Described thyristor triggers monitoring subsystem and comprises thyristor and the thyristor triggering monitoring means that is provided with its coupling.
2. direct-current transmission converter valve control protection system as claimed in claim 1; it is characterized in that; described operational system and stand-by heat system receive from the state reporting information of converter valve simultaneously and handle; if operational system breaks down or switch to the stand-by heat system when detecting the converter valve fault, realize not having time-delay and switch.
3. direct-current transmission converter valve control protection system as claimed in claim 1 is characterized in that described valve base electronic device triggers monitoring means by one group of optical fiber and thyristor and communicates, and the optical fibre set number is corresponding one by one with the thyristor progression of single converter valve;
Described valve base electronic device triggers thyristor according to the triggering time sequential pulse that utmost point control system sends, and failed thyristor is positioned.
4. direct-current transmission converter valve control protection system as claimed in claim 3 is characterized in that described valve base electronic device comprises Control on Communication cabinet and detection trigger cabinet; Described Control on Communication cabinet receives from the control command of utmost point control system and with it and sends to triggering monitoring cabinet respectively, receive simultaneously to triggering converter valve and the valve base electronic device state information that the monitoring cabinet sends, to be transmitted to utmost point control system after the information aggregation process, described utmost point control system carries out corresponding protection action and issues trigger impulse according to the feedback information of valve base electronic device;
Described triggering monitoring cabinet is finished and is received behind the trigger command CP through being encoded into trigger impulse, send to thyristor and trigger monitoring means, and the reception thyristor triggers the repayment pulse of monitoring means, judge the converter valve state, and regularly upload the thyristor state information by bus communication, when converter valve breaks down, provide and report to the police or the tripping operation request.
5. direct-current transmission converter valve control protection system as claimed in claim 3 is characterized in that described Control on Communication cabinet is used to finish acquisition process, sending of VBE upward signal and the communicating by letter of incident of downstream signal, and the debugging of engineering site; Comprise communication board, output and tablet, power panel, check-out console and debugging plate;
Described triggering monitoring machine case comprises valve arrester operation counter, water leak detectors and gps clock; Described valve arrester operation counter is counted the action frequency of valve arrester; Whether described water leak detectors leaks to water-cooling system is detected; Described gps clock writes down and reports the situation of leaking of converter valve state, valve arrester action situation and water-cooling system.
6. direct-current transmission converter valve control protection system as claimed in claim 3 is characterized in that, comprises in described one group of optical fiber triggering optical fiber and repayment optical fiber; Thyristor progression≤144 of single converter valve.
7. direct-current transmission converter valve control protection system as claimed in claim 1, it is characterized in that described thyristor triggers the protection level of turning down automatically after monitoring means is used to realize thyristor triggering and monitoring, thyristor forward overvoltage protection, thyristor dv/dt protection, the action of forward overvoltage protection, the reverse recovery and protection of thyristor, discontinuous current protection and with thyristor level state with protect the action situation to be sent to valve base electronic device by optical fiber; Be in high potential when thyristor triggers monitoring means, its work capacity obtains from thyristor damping loop.
8. direct-current transmission converter valve control protection system as claimed in claim 1 is characterized in that described control protection system comprises water-cooling system and thyristor damping loop, and described water-cooling system is connected with thyristor respectively with thyristor damping loop; The number in water-cooling system and thyristor damping loop is corresponding one by one with the thyristor level respectively.
9. a direct-current transmission converter valve control guard method is characterized in that, the object of protection of described guard method comprises converter valve protection and the protection of valve base electronic device faults itself; The result of the action of guard method comprises that warning, request are switched and the request tripping operation; Described guard method comprises:
(1) when the valve base electronic device of operational system and stand-by heat system all during operate as normal, after the control protection system is received the trip signal of operational system, carry out operational system and stand-by heat system and switch,, then carry out trip operation if the operational system after switching is received trip signal;
(2) when having only 1 cover valve base electronic equipment operate as normal, another set of valve base electronic device fault, the control protection system is received the valve base electronic device request trip command of operate as normal, carries out locking converter valve trip operation;
(3) when the fault valve base electronic device sends the request tripping operation, the control protection system is not carried out trip operation;
(4) valve base electronic device triggers the information real-time judge converter valve state of monitoring means and water leak detectors repayment according to thyristor.
10. direct-current transmission converter valve control guard method as claimed in claim 9 is characterized in that the safeguard measure of converter valve comprises:
Thyristor progression≤redundant the progression that damages in A, the single converter valve, the control protection system is reported to the police;
B, in the single trigger process, if thyristor progression≤redundant progression+2 that overvoltage protection triggers take place in single converter valve, the control protection system is reported to the police;
C, water-cooling system seepage, the control protection system is reported to the police;
D, water-cooling system are leaked, and the control protection system is reported to the police;
The thyristor progression that damages in E, the single converter valve〉redundant progression, valve base electronic device request tripping operation;
F, in the single trigger process, if the thyristor progression that overvoltage protection triggers takes place in the single valve set point, valve base electronic device request tripping operation;
G, valve arrester action, valve base electronic device reports action frequency.
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