Equipment Development Of Hybrid Active Power Filter With Injection Circuit For110kv Hurun Substation

This paper analyzes the―Key Technical and Engineering Applications of35kVHybrid Active Power Filters with Injection Circuits‖project to address thedevelopment of China’s high-voltage distribution networks, the insufficiencies ofharmo nic suppression tec hno logy, and the reactive power output co mpensationtechno logy that is still currently in need of deve lopment. Thro ugh this process, thispaper also aims to develop applications for a Hybrid Active Power Filter withInjectio n Circuit (HAPFIC) for the110kV HuRun s ubstatio n with35kV bus loadcharacteristics.The harmonic contamination issue, the ineffective compensation issue, thefactors issue, the occurrence of vo ltage leve l ma lfunctio ns, and other similar issuesrelated to the110kV HuRun s ubstation ha ve been ana lyzed in the last five years. Thepaper proposes a sche me for35kV bus at the substation for centra lized administrationof reactive power compensation and harmonic suppression.Then，this paper introduces the HAPFIC topo logical structure, and establis hesthe harmonic fie ld classification of its electronic circuit, and uses theory to ana lyzethe princip les of harmonic suppression. It also proposes a method that use harmonicpower to achie ve the purpose of e liminating harmonic. In addition, it proposes amethod to obtain the phase of harmonic vo ltage vector orientatio n and a method to usesquare volts as the control measure for the high-speed tracking contro l of DC-s idevolta ge. It then derives an electric current inner loop tracking deadbeat controlstrategy, and creates a HAPFIC syste m integrated contro l strategy flow d iagra m, andcontrasts simulations with traditiona l PI contro l methods, verifying the accuracy andeffectiveness of the control tactics outlined in this paper.The RTDS closed-loop simulation tec hno logy o f a35kV HAPFIC has beenbrought up, and for the first time, carries out control a nd protection under norma loperating cond itions, ma intenance cond itions and fault conditio ns about RTDSclosed-loop simulation under different operating conditions. The paper also devises anoverall progra m for RTDS c losed-loop simulation o f HAPFIC system contro l andprotection, builds an RTDS c losed-loop test model, and conducts verification o ffunda menta l tre nds. The paper also brings up that under a10kHz high-freque ncypulse model, the RTDS virtua l IGBT power switc h compone nt and the electric circ uitof the control unit interface interactive response strategies and IGBT trigger pulse signa l recomb ination form the contro l word techno logy. Next, the paper seeks toverify the effects of HAPFIC system harmo nic administration and reactive powercompensation, control and protect the unit’s dynamic performance, and operate toprovide a powerful fo undation for system design, debugging, on-site commiss ioning,etc.On the basis theoretical research of HAPFIC syste ms, deve loped a35kVHAPFIC device, and at the110kV HuRun s ubstatio n imple me nted a pilot application.The results show a s ignificantly improve ment o f the power factor for the35kV utilitygrid connectio n po ints, and harmo nic current and harmonic vo ltage being reducedsignifica ntly from above the accepted thresho ld to well-be low the internatio na l limit.The many harmonic and reactive power troub les facing the substatio n over the yearswere brought under control. Lastly, the reactive power and harmo nic losses insubstation equip me nt are noticeably reduced, resulting in s ignificant economic andsocia l bene fits.App licatio n has proven that the HAPFIC syste m deve loped in this artic le canmeet the high-voltage distribution network’s reactive power compensation andharmo nic current suppressio n require ments. This confirms the accuracy, effective ness,and feas ibility of the DC-side fast-track contro l method and the electric current innerloop tracking deadbeat control strategy. This has made outstand ing contributio ns toprovide a high-qua lity supp ly of electric ity by substations, save energy, and lowerequip ment accident rates. At the same time, it has bro ught profo und bene fic ial e ffectsto the economic develop ment of the region where the substation is located.