CN103955210A - Direct-current protection verification method - Google Patents
Direct-current protection verification method Download PDFInfo
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- CN103955210A CN103955210A CN201410194153.4A CN201410194153A CN103955210A CN 103955210 A CN103955210 A CN 103955210A CN 201410194153 A CN201410194153 A CN 201410194153A CN 103955210 A CN103955210 A CN 103955210A
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Abstract
The invention relates to a direct-current protection verification method. The method comprises the following steps that (1) electrical quantities and a circuit diagram of a direct-current converter station are acquired; (2) the secondary current of the current quantities and the voltage quantities is simulated through a current generator and a voltage generator, and on-off indication signals of a disconnecting link and a switch are simulated through normally-open nodes and normally-closed nodes; (3) the output end of a simulator obtained in the step (2) is connected with a system terminal row of a control protection system to be verified; (4) the output quantity of the simulator is adjusted according to a verification scheme, and whether a corresponding alarm is given is checked in the background. Compared with the prior art, the direct-current protection verification method has the advantages of being suitable for various control protection systems and the like.
Description
Technical field
The present invention relates to a kind of method of calibration, especially relate to a kind of direct current protecting method of calibration.
Background technology
Along with the fast development of China's economic, extra-high voltage, UHV (ultra-high voltage) interregional grid, also along with fast development, have built up 15 and two back-to-back converter substations of DC transmission system that put into operation now.At the particularly electrical network of East China of each province and city electrical network, direct current transmission power occupies significant proportion, and therefore the stability of DC converter station will badly influence the stable of AC network.Along with the current conversion station growth of working time; current conversion station equipment starts to occur aging; particularly for DC control and protection system; owing to having adopted the MACH2 system of ABB or the complete equipment protection system of being permitted to continue; this electronic product all has tenure of use; along with the prolongation of working time, various unknowable faults all likely occur.But in existing current conversion station O&M, lack the device that DC control and protection system is carried out to verification, cause direct current control to protect the blind spot that becomes status monitoring.
The Chinese patent that for example application number is 200810064450.1 discloses a kind of verifying device for relay protection experimental instrument; this device comprises: output circuit in cabinet and cabinet, have input circuit; input circuit is connected with analog to digital converter; analog to digital converter is connected with microprocessor; microprocessor is connected with display; microprocessor is connected with crystal oscillating circuit, keyboard circuit respectively, and the present invention is applied to verification, adjusts the important technological parameters of relay protection experimental instrument.But this device can not be applicable to most verifications of controlling protection system.
Summary of the invention
Object of the present invention is exactly to provide a kind of direct current protecting method of calibration that is applicable to various control protection system in order to overcome the defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of direct current protecting method of calibration, is characterized in that, the method comprises the following steps:
1) obtain DC converter station electric parameters and circuit diagram;
2) secondary current of use current feedback circuit and voltage generator analog current, voltage, use is often opened, normally closed node is simulated deciliter indicator signal of disconnecting link, switch;
3) by step 2) output terminal of the analogue means that obtains is connected with the system terminal row of control and protection system to be verified;
4) according to checkschema, adjust analogue means output quantity, look on backstage and see if there is corresponding warning generation.
Described control and protection system is the complete equipment protection system that the MACH2 system of ABB perhaps continues.
Described step 1) in electric parameters comprise direct current inlet wire current, DC bus-bar voltage, DC filter high voltage side current, out-of-balance current, reactor current, straight-wavy valve Room inlet wire current, valve Room neutral line voltage and neutral current.
Described step 3) in the corresponding analog quantity of each output terminal and digital quantity in analogue means, and analog output port also configures rotary knob, and output quantity is regulated.
Compared with prior art; the present invention is by the analysis to conventional straight-flow system and the comparison to extra-high voltage direct-current system; develop the output port of typical control protection calibration equipment; can control for the overwhelming majority verification of protection system, for the O&M maintenance of DC converter station in the future provides special tool utensil.
Brief description of the drawings
Fig. 1 is the process flow diagram of the inventive method;
Fig. 2 is a kind of layout circuit figure of current conversion station secondary side;
Fig. 3 is the analogue means circuit diagram corresponding with Fig. 2 circuit diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment is implemented as prerequisite taking technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
A kind of direct current protecting method of calibration, as shown in Figure 1, the method comprises the following steps:
1) obtain DC converter station electric parameters and circuit diagram;
2) secondary current of use current feedback circuit and voltage generator analog current, voltage, use is often opened, normally closed node is simulated deciliter indicator signal of disconnecting link, switch;
3) by step 2) output terminal of the analogue means that obtains is connected with the system terminal row of control and protection system to be verified;
4) according to checkschema, adjust analogue means output quantity, look on backstage and see if there is corresponding warning generation.
A kind of layout circuit figure of current conversion station secondary side as shown in Figure 2, the circuit diagram of design analogue means as shown in Figure 3 after conversion.
Control and protection system is the complete equipment protection system that the MACH2 system of ABB perhaps continues.
Step 1) in electric parameters comprise direct current inlet wire current, DC bus-bar voltage, DC filter high voltage side current, out-of-balance current, reactor current, straight-wavy valve Room inlet wire current, valve Room neutral line voltage, neutral current etc.
Step 3) in the corresponding analog quantity of each quick output port and digital quantity in analogue means, and analog output port also configures rotary knob, can regulate output quantity.
In typical DC control and protection system, adopt following electric parameters: direct current inlet wire current IDL; DC bus-bar voltage UDL; DC filter high voltage side current T1; out-of-balance current T2; and reactor current T3, T4; straight-wavy valve Room inlet wire current IDP; valve Room neutral line voltage U DN; neutral current IDNC, ICN, IAN, IDGND, IANE, IDEL1, IDEL2 etc.; secondary current, the voltage of these electric parameters are all little; therefore, we can pass through electric current, voltage generator, simulate the secondary current of these electric currents, voltage.By often the opening of relay, normally closed node, simulate deciliter indicator signal of some disconnecting links, switch in addition, be equivalent to arrange a small-sized DC converter station simulation system on this contrive equipment.Separately on this device, corresponding each analog quantity and digital quantity, all have an output port efficiently, and analog output port also configures rotary knob, can regulate output quantity.In the time controlling guarantor's verification, can be connected with control and protection system terminal row by output port, subsequently according to checkschema, adjust checking data, look on backstage and see if there is corresponding warning generation.
Claims (4)
1. a direct current protecting method of calibration, is characterized in that, the method comprises the following steps:
1) obtain DC converter station electric parameters and circuit diagram;
2) secondary current of use current feedback circuit and voltage generator analog current, voltage, use is often opened, normally closed node is simulated deciliter indicator signal of disconnecting link, switch;
3) by step 2) output terminal of the analogue means that obtains is connected with the system terminal row of control and protection system to be verified;
4) according to checkschema, adjust analogue means output quantity, look on backstage and see if there is corresponding warning generation.
2. a kind of direct current protecting method of calibration according to claim 1, is characterized in that, the complete equipment protection system that the MACH2 system that described control and protection system is ABB perhaps continues.
3. a kind of direct current protecting method of calibration according to claim 1; it is characterized in that described step 1) in electric parameters comprise direct current inlet wire current, DC bus-bar voltage, DC filter high voltage side current, out-of-balance current, reactor current, straight-wavy valve Room inlet wire current, valve Room neutral line voltage and neutral current.
4. a kind of direct current protecting method of calibration according to claim 1; it is characterized in that; described step 3) in the corresponding analog quantity of each output terminal and digital quantity in analogue means, and analog output port also configures rotary knob, and output quantity is regulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410194153.4A CN103955210A (en) | 2014-05-09 | 2014-05-09 | Direct-current protection verification method |
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| CN201410194153.4A CN103955210A (en) | 2014-05-09 | 2014-05-09 | Direct-current protection verification method |
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| CN103955210A true CN103955210A (en) | 2014-07-30 |
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| CN201410194153.4A Pending CN103955210A (en) | 2014-05-09 | 2014-05-09 | Direct-current protection verification method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823947A (en) * | 2016-05-04 | 2016-08-03 | 国家电网公司 | High voltage direct current protection system field calibration method and device |
| CN107238768A (en) * | 2017-05-15 | 2017-10-10 | 国家电网公司 | A kind of direct current protecting time on-site calibration device and method based on same clock source |
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| CN201413389Y (en) * | 2009-04-24 | 2010-02-24 | 红相电力（上海）有限公司 | Charged checking instrument of current transformer |
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| CN105823947A (en) * | 2016-05-04 | 2016-08-03 | 国家电网公司 | High voltage direct current protection system field calibration method and device |
| CN105823947B (en) * | 2016-05-04 | 2018-07-10 | 国家电网公司 | A kind of high voltage direct current protection system for field method of calibration and device |
| CN107238768A (en) * | 2017-05-15 | 2017-10-10 | 国家电网公司 | A kind of direct current protecting time on-site calibration device and method based on same clock source |
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Application publication date: 20140730 |